Paper-cutting machine



c. sEYBoLp PAPER CUTTING MACHINE Filed- May Y 1'?, 1925 March 1.0. 1925- Patented Mar. 10, 1925. i i l VUNITED STATES CHARLES sEYBoLn,

PATE-Nr OFFICE.

on DAYTON, omo.

PAPERfoUTTING MACHINE- Application filed May 17,

Machines, of which-the followingis a full',I

clear, and exact description, reference-.being had to the accompanying drawing, forming part of this specification.

My invention relates to improvements in paper cutting machines in which a reciprocating knife is held by a knife bar, having bearings at each end, which operate in certain bearings, provided on the frame of the machine, or on the clamp, which holds the paper in place while cutting.

It has been found in practice, that where a very long knife blade is used, the hardness and resistance ofthe material to be cut, causes the knife to spring at or near the center, thus producing either aconcave or convex cut in the material as the tendency of that particular knife may be.

My object is provide an additional, adjustable bearing, preferably in the form of a wedge, suitably situated to counteract any tendency of the knife to spring or bend out of its proper alignment.

I attain these objects by the mechanism illustrated in the accompanying drawing, in which- Figure 1 is a front eleva-tion of the upper portion of a paper cutting-machine, with a section of the knife and knife bar broken away, showing the adjustable bearing.

Figure 2 is a vertical section on the line 2-2 of Figure l.

Figure 3 is a plan view of the adjustable bearing.

Figure 4 is a front elevation of the adjustable bearing.

The clamp 1, which is the means of holding the material during the process of cutting, is recessed at 2 to admit the wedge member of the bearing 3, said member being provided at its upper end 4,' with al sleeve 5, having a hole 6 (not threaded) to admit a screw stud 7, said stud being threaded and inserted in a threaded hole 8, in clamp l, and secured by a locknut 9. The sleeve 5 on the wedge member 3 is then passed over the stud 7 first having passed a looknut 10 over the stud, and is secured in place by the locknut 11. By means of the locknuts 10 and 1l, the bearing may be adjusted up- 1923. Serial No. 639,686.-`

ward or `downward and finally locked in place when the desired adjustment hasbeen attainedV y It will appear obvious thatany lubricant employed between this bearing and the knife or knife bar, would soil the paper stock. I have therefore, provided in the' face l2, of thewedge member 3, a number vof recesses 13, inserted in which are anumber of liiber 'plates 14, fastened toithefwedge member by screws 15, these plates to bear against the back of the knife 16, and knife bar 17 thus forming a bearing contact that requires no lubrication.

As will be seen from this description and the accompanying drawings, my device provides a bearing surface at B, in addition to those usually employed at A-A. Should an imperfect knife show a tendency to make a concave cut, the defect may be remedied by adjusting the bearing downward by means of the adjusting nuts 10 and 11, thus forcing the knife bar and knife forward at the-center; or in the case of the opposite tendency to produce-a convex cut, an upward adjustment of the bearing would permit the knife bar to spring or bear in the opposite direction, and bring the knife into true alignment.

I am well aware that it would be possible to attain this result with a blade having a number of screws` for adjustment; but in this case the adjustments would need to be very accurate in order to V'bring about perfect alignment at the cutting edge. Also my object could be accomplished by means of an adjustable wedge imbedded in the knife bar between it and the knife, instead of in the clamp.V In either case the con- Letters Patent, is v l. In a paper cutting machine having a reciprocating knife bar and knife, and. a clamp for holding the material while cut-i ting, an adjustable bearing for the knife intermediate its ends to prevent said knife soY and knifezybalinfrom' :springing or bending" out ofalignment. f

2. In a paper cutting machine havingl a reciprocating knife bar,` and lgnigfemvvith. beaiungs therefor at eachl end, and aV clamp for holding the material Whiles.,cutting;anl

adjustable additional bearing intermediate the end bearings inserted between theelamp andknife bar, to prevent said knifeand knife :bar rond'l sprirr'gingf'or 'bending outv vof alignment. f Y 3. yIn. combination with a paperv oittfifng machine'havigng proca-ting bar and knife with cla foroldifng-`the*m' te'ijial` ini-place: While ott-inggf s'aidf'cl'a against the lkiife ma@ mdf 'nine-taf ana proventi, them from springing' lor bending out 'or alignment. v

4. In a paper cutting machine, having a reciprocating knifebar and knife With bearings therefor at each end and a clamp, an adjustable,:Wedge-shaped bearing at or near the center between the bar and clamp and a screwstnd for adjnsting said bearing, said stud at one end being inserted into the clamp andenitable means toradjutingand holzding1 the bearing inA a definite position.

f' plnapapercntting machine, having a reciprocatingknife 4bar andA 'knife "vvith intermediate',bearing/refthe knife bar, Seidl bearing: being providedvwithv bearingrieti'onal' materiall reqniring no1 zlubrication.r.` 1f f CHARLES SYOLDY. 

